Restr:Recorde - The Whetstone of Witte - equals.jpg

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Recorde_-_The_Whetstone_of_Witte_-_equals.jpg (490 × 194 piksel, ment ar restr : 75 Kio, seurt MIME : image/jpeg)

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Deskrivadur
English: Robert Recorde's explanation of the first usage of the mathematical equals sign from which the current "=" symbol origins.
Čeština: Vysvětlení Roberta Recorde prvního použití matematického symbolu rovnosti, ze kterého vychází dnešní znak "=".
Deiziad
Mammenn http://blog.plover.com/math/recorde.html - The image is an excerpt from the Recorde's book The Whetstone of Witte.
Aozer Robert Recorde

The text in the scanned image transcription

Howbeit, for easie alteratiõ of equations. I will propounde a fewe exãples, bicause the extraction of their rootes, maie the more aptly bee wroughte. And to auoide the tediouse repetition of these woordes : is equalle to : I will sette as I doe often in woorke vse, a paire of paralleles, or Gemowe lines of one lengthe, thus: =====, bicause noe .2. thynges, can be moare equalle. And now marke these nombers.

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Public domain
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Note: This tag should not be used for sound recordings.PD-1923Public domain in the United States//commons.wikimedia.org/wiki/File:Recorde_-_The_Whetstone_of_Witte_-_equals.jpg

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